RectangleWin

A lightweight Windows window manager inspired by Rectangle for macOS.

Snap windows to halves, quarters, or center using simple keyboard shortcuts — no mouse needed.

Keyboard Shortcuts

All shortcuts use Ctrl + Alt as the modifier.

Shortcut	Action
Ctrl+Alt+←	Left half
Ctrl+Alt+→	Right half
Ctrl+Alt+↑	Top half
Ctrl+Alt+↓	Bottom half
Ctrl+Alt+U	Top-left quarter
Ctrl+Alt+I	Top-right quarter
Ctrl+Alt+J	Bottom-left quarter
Ctrl+Alt+K	Bottom-right quarter
Ctrl+Alt+Enter	Maximize
Ctrl+Alt+C	Center

Why Ctrl+Alt?

The original Rectangle on macOS uses Control + Option (⌃⌥) as its modifier. On a Mac keyboard, the bottom row goes Control, Option, Command — so the modifier is just two adjacent keys.

I use PowerToys Keyboard Manager to remap my bottom-row keys to Ctrl, Alt, Ctrl (left to right), matching the Mac layout. This makes Ctrl+Alt combos feel just as natural as on macOS — two adjacent keys with one hand.

Features

• System tray icon with right-click menu
• Auto-start with Windows (toggle via tray menu)
• Multi-monitor support (snaps to the monitor the window is on)
• Single instance — prevents duplicate processes

Requirements

• Windows 10 or later
• .NET 8.0 Runtime

Build & Run

dotnet run --project RectangleWin

Or build a standalone executable:

dotnet publish RectangleWin -c Release -r win-x64 --self-contained

License

MIT